Alvin ford



(No Model.)

A. FORD.

STEAM BOILER.

N0. 272,225. Patented Feb. 13,1883.

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NITED STATES PATENT Erica.

ALVIN roan, or CHICAGO, ILLINOIS, ASSIGNOR or pan-HALF TO CHARLES B. COVENTRY, OF SAMEPLAGE.

STEAM-BOILER.

SPECIFICATION forming" part of Letters Patent 1\TO.- 272,225, dated February 13, 1853.

- Application filed December 15, 1882. No model.)

To all whom it may concern:

Be it known that I, ALVIN FORD, a citizen of the United States, residing at Chicago, Illinois, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

. The object of my invention is to provide means by which an increase of power 'will be obtained and economy in the use of steam and I0 fuel secured.

In the accompanying drawings, Figure 1 is a longitudinal vertical sectional view of my improved boiler, showing the internal arrangement of the heating and superheating flues; and Fig. 2 is a cross-vertical sectional view of the same, showing the relative positions of the heating and snpeiheating compartments, partition, and steam-space' In the drawings, A and B represent the zo'boiler in which the heating and super-heating lines are located; D, the heating-fines in the lower part of the boiler; E, the superheatinglines in the upper part of the boiler; F, the fire chamber; G, the smokestack; P, the 2 5 chamber or space at the front end of the boiler, into which the heating and super-heating flues open through the crown-sheet, and T the opening from the steam-space over the heating-fines to the upper compartment of the boiler con- 0 taining the superheating-flnes.

In constructing a boiler containing my improvements I place a series of heating-fines in its lower part, which open through the-crownshcet at the rear end into the furnace or firechamber and open through the crown-sheet at the front ends into a chamber, say, a foot in width and extending across the front end of the boiler. Over these heating-fines I providea steam-space, as in a boiler of the ordinary 4 construction, and at 'the top of this steamspace I place a partition extending horizontally from one end of the boiler to the other and from side to side. In this way-I divide the boiler into two compartments-an upper and a lower one. In the lower apartment are contained the water and theheating-flnes for converting the same into wet steam. In the upper compartment I place a series of superheating-flues,opening through the crown-sheet at their front ends into the chamber above before it is applied to use.

mentioned and through the crown-sheet at their rear ends into the space leading to the smoke-stack. In the partition I provide large openings, preferably near its front end, through which the wet steam passes freely into the upper or superheating apartment of the boiler and circulates around the snperheating-fl-nes. These openings are made large and provided with no valve or other hinderance to the free ingress of the steam as it is produced from the 6 boiling water in the lower compartment and rises into the steam-space. For the object for which these openings are provided it is not necessary nor desirable that they sho'nld be smaller than the steam-port through which the 6 superheated steam is conveyed to the cylinders, as it is intended that'they shall permit the perfectly free and unobstructed passage of the wet steam from the lower to the upper compartment. The heat and flame are drawn 7o forward through the heating-fines in the lower compartment, and, turning, are drawn by the draft in the smoke-stack back through the superheating-flues in the upper compartment, and thence into the smokestack and out into the open air, as indicated by the arrows in Fig. 1. In this way the steam is superheated The smoltestack, as shown in the drawings, is located adjacent to the cab of the locomotive; It may, however, be located at the middle or other convenient point on the boiler; but this of course shortens the length of the superheating-flnes.

In order to prevent the superheating-iiues in the snperheating-compartment from becoining toohot and burning out, 1 provide a stationary perforated plate, I, at the front endpf snperheating boiler or compartment, so that the perforations extend through into the chamber 1?, above described, against which I place 0 an adjustable perforated plate, H, which may ,be adjusted up and down or from side to side,

so as to bring its perforations over the perforations in the stationary piece or away from them,as desired. I connect the movable perforated plateH with a rod or lever extending back to the cab,'and by means of which the engineer may adjust the same so as to make its perforations correspond with the perforations in the stationary plate or otherwise, as

desired. When the superheating-flues are in danger of becoming overheated the movable plate may be adjusted and a blast of cold air 'admitted into the superheating-flues, by which IO August 13, 1861, and I do not therefore claim it.

What I consider as new, and desireto secure by Letters Patent, is

A locomotive or other boiler provided with a series of heating-Hues, a steam-space above such flues, a partition having large and uuob structed openings, and asuperheating-compartment into which the steam is conveyed through the openings and superheated, all arranged in one boiler or shell, substantially as described.

ALVIN FORD. Witnesses:

CHARLES C. LINTHIUUM, EPHRAIM BANNING. 

